Ghostscript is a processor for PostScript and PDF files. It can rasterize these files to a wide variety of printers, devices for screen preview, and image file formats. Since applications tend to prepare pages for printing in a high-level format such as PostScript, most Unix users with low-level bitmap printers, such as inkjets, use GhostScript as part of the printing process. In addition, Ghostscript is capable of converting PostScript files, functionality comparable to Adobe Acrobat Distiller, but on the command line. In addition, Ghostscript is used for file import and viewing by a great many other applications, including xv, ImageMagick, gimp, and xdvi. Several GUI wrappers for viewing PostScript and PDF files exist, including GSview, ghostview, gv, ggv, and kghostview. This is far from a comprehensive list.

Allegro is a multi-platform game library for C/C++ developers that provides many functions for graphics, sounds, player input (keyboard, mouse, and joystick), and timers. It also provides fixed and floating point mathematical functions, 3D functions, file management functions, compressed datafile, and a GUI.

Arianne is a multiplayer online engine to develop
turn based and real time games. It provides a
simple way of creating games using Python for a
game's description. Marauroa, its server, uses
Java, MySQL, UDP, and Python for hosting dozens of
players.

asmutils is a set of miscellaneous utilities
written in assembly language, targeted on embedded
systems and small distributions (e.g. installation
or rescue disks). It also contains a small libc
and a crypto library. It is optimized for size,
memory usage, and speed, and offers fairly good
functionality. The project supports Linux and the
BSD family. Unixware, Solaris, and AtheOS support
is in beta stage. This package also aims to
provide a portable development framework, and to
encourage assembly programmers to write for
Linux/Unix.

Bomber Instinct is a multiplayer-only bomberman-like game which adds many features (such as special powers for the characters). Basically, several people must battle in a maze, their only weapon being a bomb which explodes, throwing flames vertically and horizontally. The game only plays on a single computer for now.

BZFlag is a 3D, multiplayer, tank battle zone,
capture the flag game that pits players against
each other in a networked environment. It runs on
Windows 95/98/NT/2000, Linux, MacOS 10.x, Irix,
Solaris, and others. An OpenGL accelerator is
highly recommended, but it is playable with 3D in
software.

CALAMAR is an accounting program entirely written in Java. It supports multiple clients, a flexible chart of accounts, multiple currencies and VAT. Calamar has been localized for French, German, Polish, and English.